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Radon Levels in Edmonson County, Kentucky

EPA puts Edmonson County in Zone 2, its middle radon zone, and 21.0% of its 62 reported radon tests (2008 to 2017, laboratory totals) were at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

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  • Share at 4+ pCi/L

    21.0%

    22.7 pts below KY

    Edmonson
    21.0%
    Kentucky
    43.7%

    62 tests, 2008 to 2017

  • Median result

    1.6pCi/L

    Below action level

    Edmonson
    1.6 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    62

    47th of 69 by tests

    Edmonson
    62
    Jefferson
    6,590

    Reported to CDC before any fix, 2008 to 2017

  • EPA radon zone

    Zone 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    EPA predicts 2 to 4 pCi/L indoors

  • Rank in Kentucky

    60 of 69

    Lowest quarter

    Edmonson
    21.0%
    Meade
    68.4%

    By share, of 69 with 30+ tests

Read a result for Edmonson County

Starts at Edmonson County's median, 1.6 pCi/L

1.6pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 1.6 pCi/L

Below 2 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Edmonson County's median reported result, 2008 to 2017.

Interpret this reading

The data

Edmonson County, At a glance

Edmonson County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Edmonson County is a county: EPA's forecast for it as a whole is an average indoor of 2 to 4 pCi/L (75 to 150 Bq/m³). It describes no single address, and homes above EPA's are found in every zone, this one included.

USGS geologic potential: Moderate across 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Edmonson County, 2008 to 2017, laboratory

Reported results by concentration band, Edmonson County, 2008 to 2017, laboratory
Under 2 pCi/L: 60%2 to 4 pCi/L: 19%4 pCi/L and above: 21%

Of 62 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Edmonson County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L3759.7%
2 to 4 pCi/L1219.4%
4 pCi/L and above1321.0%
What these figures count

These are the 62 tests reported to CDC for Edmonson County over 2008 to 2017 (laboratory totals), many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.

Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).

How to read these figures

Edmonson County, Compared

Edmonson County radon figures, compared

Calculated by Radon411

Edmonson County's 62 reported tests over the 2008 to 2017 laboratory totals had a middle value of 1.6 pCi/L and a maximum of 48.5 pCi/L, and 21.0% reached 4 pCi/L. Kentucky as a whole (120 Kentucky counties, pooled) comes to 43.7%: 22.7 points higher than here.

Among its state's counties it ranks 60th of 69 Kentucky counties with 30 or more tests for the same period. Statewide for the same period, Meade County reported the highest share (68.4%) and Hopkins County the lowest (9.5%).

Below the action level, 37 tests (59.7%) came in under 2 pCi/L, against 33.2% statewide, and 12 tests (19.4%) fell between 2 and 4, against 23.1% statewide. CDC's ten-year totals for Edmonson County went from 56 tests (2005 to 2014) to 62 (2008 to 2017), the share going from 17.9% to 21.0%.

EPA's 1993 zone map puts Edmonson County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.

Next door, the shares run from 27.8% in Grayson County to 65.5% in Hart County.

Edmonson County against Kentucky, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Edmonson County
Edmonson County6221.0%1.6 pCi/LThis county
Kentucky, pooled120 counties, pooled28,79343.7%Not pooled+22.7 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+14.7 points
Meade Countyhighest in the state11768.4%8.2 pCi/L+47.4 points
Hopkins Countylowest in the state429.5%1.7 pCi/L−11.5 points
Hart County, KYborders it8465.5%8.0 pCi/L+44.5 points
Warren County, KYborders it1,62461.5%6.3 pCi/L+40.5 points
Barren County, KYborders it18651.6%4.0 pCi/L+30.6 points
Grayson County, KYborders it3627.8%2.2 pCi/L+6.8 points
Butler County, KYborders it263.8%1.5 pCi/L−17.2 points
Where Edmonson County's reported results fell, 2008 to 2017, laboratory, beside Kentucky and the United States
ResultEdmonson County testsEdmonson County shareKentucky shareU.S. shareAgainst Kentucky
Under 2 pCi/L3759.7%33.2%39.6%+26.5 points
2 to 4 pCi/L1219.4%23.1%24.7%−3.7 points
4 pCi/L and above1321.0%43.7%35.7%−22.7 points
Edmonson County ranked among the 69 Kentucky counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Russell County54 of 693225.0%2.9 pCi/L
Henderson County56 of 695424.1%2.3 pCi/L
Trigg County57 of 694522.2%2.4 pCi/L
Laurel County58 of 6910022.0%1.9 pCi/L
Menifee County59 of 694122.0%1.4 pCi/L
Edmonson County60 of 696221.0%1.6 pCi/L
Daviess County61 of 6914520.0%1.8 pCi/L
Breathitt County62 of 694719.1%1.7 pCi/L
Rowan County63 of 697418.9%1.6 pCi/L
Boyd County64 of 6916817.9%2.1 pCi/L
Todd County65 of 696217.7%1.8 pCi/L
Edmonson County ten-year laboratory totals, against Kentucky's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestKentucky, pooledChange from the row before
2008 to 20176221.0%1.6 pCi/L48.5 pCi/L43.7%+2.4 points
2007 to 20165918.6%1.4 pCi/L18.2 pCi/L45.1%+1.7 points
2006 to 20155916.9%1.4 pCi/L18.2 pCi/L46.4%−1.0 points
2005 to 20145617.9%1.4 pCi/L18.2 pCi/L47.3%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

Edmonson County, Geology

The ground under Edmonson County

Predicted

USGS's geologic map puts all of Edmonson County's mapped land in one class: moderate radon potential. The map puts 50.1% of Edmonson County in the area it calls Western Coalfield and 49.9% in Mississippian Plateau. USGS gives the first a radon index of 9 and the second 11, both in the moderate band (9 to 11).

USGS's geologic areas under Edmonson County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Western CoalfieldLimestones, shale, siltstone, and coal beds.Moderate950.1%
Mississippian PlateauMississippian marine limestones, dolomites, marine sandstones, siltstones, and shales.Moderate1149.9%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Edmonson County beside the ground around it

Across Kentucky 18.2% of the land is rated high; none of Edmonson County's is. Of the 5 counties that border it, 2 have more high-potential ground, Barren County the most at 50.0%.

Share of land by USGS radon potential: Edmonson County, the 5 counties bordering it and Kentucky
AreaEPA zoneLow potentialModerate potentialHigh potential
Edmonson CountyZone 2None100%None
Warren CountyZone 1None99.9%0.1%
Hart CountyZone 1None100%None
Grayson CountyZone 2None100%None
Barren CountyZone 1None50.0%50.0%
Butler CountyZone 2None100%None
Kentucky120 counties, pooled by land areaVaries5.7%76.1%18.2%

The map rates the ground, not the air in any home.

Local help

Edmonson County, Local resources

Radon testing and mitigation in Edmonson County

What Kentucky's program says
Phone
502-782-2782
Email
Radon@ky.gov

What it means

Edmonson County, Questions

Questions about radon in Edmonson County

Are radon levels high in Edmonson County?

Over the 2008 to 2017 laboratory totals, 21.0% of the radon tests reported to CDC for Edmonson County, Kentucky were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.6 pCi/L. Of 69 Kentucky counties with 30 or more tests for the same period, 59 reported a higher share; pooled, the state comes to 43.7%.

Which counties border Edmonson County?

Edmonson County borders 5 counties: Warren County, Hart County, Grayson County, Barren County and Butler County.

Products

Edmonson County, Products

Testing a home in Edmonson County

In Edmonson County, 21.0% of 62 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 43.7% pooled across Kentucky. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Edmonson County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Edmonson County homes, compared

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Edmonson County, Bordering counties

Counties bordering Edmonson County

Calculated by Radon411

Edmonson County, Cities and towns

Cities and towns in Edmonson County

Edmonson County is growing: the Census Bureau puts it at 12,749 residents on July 1, 2025, up 5.0% from 12,140 in 2020. That works out to 42 people per square mile of land. Brownsville, its one incorporated place, has 898 residents, 7.0% of the total. CDC's 62 reported tests for 2008 to 2017 work out to 4.9 per 1,000 residents (2025 estimate), close to Kentucky's 6.3.

Brownsville is the one incorporated place here; CDC publishes no figure by town, so it reads Edmonson County's.

Brownsville, Edmonson County: residents on July 1, 2025
PlaceResidentsSince 2020Share of residents
Brownsville898+3.8%7.0%

One incorporated place, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).

Edmonson County, Homes

Homes in Edmonson County

Of Edmonson County's 6,418 homes, 61% are detached houses, against 68% across Kentucky; 37% are mobile homes. Half of its homes were built before 1989, close to Kentucky's 1982: 11% date from before 1960 and 26% from 2000 or later. Owners live in 83% of the occupied homes (Kentucky: 68%), so for most households a test and a fix are their own to order.

Homes in Edmonson County, Kentucky, 2019 to 2023
HomesEdmonson CountyKentucky
Housing units6,4182,010,655
Detached houses61%68%
In buildings of 5 or more2%12%
Mobile homes37%11%
Built before 196011%22%
Built since 200026%24%
Middle year built19891982
Owner-occupied83%68%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.